JP2000022423A - Antenna system and transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily widen an angle measurement range in the case of forming a plurality of beams for detecting an object such as a mono-pulse radar by deflecting each direction of the beams at the same time without increasing the size of the system. SOLUTION: A moving part 31 is provided with pluralities of primary radiators 13a, 13b, 13c and moving part side transmission lines (dielectric strips for an NRD guide) 11a, 11b, 11c that respectively couple with the primary radiators 13a, 13b, 13c, a stationary part is provided with dielectric lenses 18a, 18b, 18c whose focal planes are at positions of the primary radiators 13a, 13b, 13c and stationary part transmission lines (dielectric strips for an NRD guide) 12a, 12b, 12c that couple respectively with the moving part side transmission lines. Then the beams are simultaneously tilted by displacing the moving part 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device used in a millimeter wave band or the like and a transmitting / receiving device using the same.

[0002]

2. Description of the Related Art Conventionally, in a radar using a microwave or a millimeter wave, a monopulse method has been adopted as one of angle measuring methods for measuring a target direction.

FIG. 13 shows an example of a beam pattern of a radar which performs angle measurement using an amplitude comparison monopulse. In the figure, TX1 is a transmission beam transmitted from the front end, and RX1 and RX2 are reception beams indicating the directional characteristics of the reception antenna received at the front end. FIG. 14 is a diagram showing how the angle measurement is performed based on two received signals. FIG. 3A shows the angle on the horizontal axis and the received signal strength on the vertical axis. (B) shows a pattern of a sum component and a difference component of the two beams. If the ratio of the difference component to the sum component is extracted as the angle error voltage signal ε, an S-shaped characteristic of the error voltage with respect to the angle is obtained as shown in FIG. The substantially linear portion of this S-shaped characteristic is shown in FIG.
3 corresponds to the angle range between the central axes of the two reception beams RX1 and RX2. Therefore, for this detection range, the target orientation can be detected from the extracted angle error voltage.

[0004]

By the way, while a vehicle is traveling on a road, for example, the monopulse system is used to measure the distance and relative speed with respect to another vehicle traveling ahead or behind, and to measure its azimuth. Can be applied, but the angle measurement range becomes a problem depending on the purpose of use of the radar. That is, in the case of the monopulse system having the above-described configuration, the divergence angle between the central axes of the two received beams is in a range where angle measurement can be performed. Since the gain is reduced accordingly, the measurable distance is shortened. Further, if it is attempted to widen only the divergence angle between the central axes of the two beams without widening the angle, the angular measurement resolution will decrease.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily widen an angle measurement range while obtaining a desired detection distance and angle measurement resolution when performing detection by forming a plurality of beams as in a monopulse type radar. And a transmission / reception device.

In the above-described example, a monopulse type radar has been described. However, in general, when detecting a predetermined direction by deflecting a transmission / reception beam, the entire antenna device is rotated. However, it is difficult to reduce the size of a radar using the antenna device having such a structure, and its use is limited. In particular, in the case of forming a plurality of beams and simultaneously deflecting the directions of the beams, the size of the entire apparatus is further increased.

It is another object of the present invention to provide an antenna device capable of simultaneously deflecting the directions of a plurality of beams without increasing the size of the entire device, and a transmitting / receiving device using the same.

[0008]

According to the present invention, a plurality of primary radiators and a movable section side transmission line respectively coupled to the primary radiators are provided in a movable section, and the plurality of primary radiators are provided in a fixed section.
A dielectric lens having a secondary radiator as a substantially focal plane, and a plurality of fixed-part-side transmission lines that are respectively electromagnetically coupled to the movable-part-side transmission line, and displace the movable part with respect to the fixed part. An antenna device is provided with the driving means.

According to this structure, the movable portion is relatively displaced with respect to the fixed portion, so that a plurality of ones provided on the movable portion are provided.
The secondary radiators are displaced within the focal plane of the corresponding dielectric lens, and the direction of the beam determined by the relative positional relationship between the primary radiator and the dielectric lens is deflected. Therefore, a multi-beam antenna device in which each beam is simultaneously deflected is obtained. Since only the primary radiator and the movable part side transmission line coupled to the primary radiator need to be provided in the movable part, the movable part can be configured to be small and lightweight, and the movable part can be displaced at high speed even by using a low torque motor or the like. . Moreover, since it is not necessary to rotationally drive the entire antenna device, it is possible to reduce the overall size and weight.

Further, in the present invention, a transmitting circuit and a receiving circuit are connected to the plurality of fixed-part transmission lines of the antenna device to constitute a multi-beam transmitting / receiving device.

Further, in the present invention, at least three antenna devices are provided, a transmission circuit is connected to a fixed part transmission line of one of the antenna devices, and a transmission circuit is connected to the fixed part transmission lines of the other two antenna devices. The receiving circuit is connected, the axes of the receiving beams of the two antenna devices connected to the receiving circuit are made different from each other, and the axis of the transmitting beam of the antenna device connected to the transmitting circuit is set to the axis of the two receiving beams. The positional relationship between the primary radiator and the dielectric lens of each of the three antenna devices is determined so as to be located substantially at the center.

According to this configuration, two receiving beams having different axes and a transmitting beam located substantially at the center of the two receiving beams are formed, and these beams are displaced relative to the fixed portion by the relative displacement of the movable portion with respect to the fixed portion. This causes the beam to deflect entirely. Therefore, by performing angle measurement using the monopulse method and simultaneously deflecting these beams,
Angle measurement can be performed over a wide range.

Further, in the present invention, at least two antenna devices are provided, a transmitting circuit and a receiving circuit are respectively connected to a fixed part transmission line of these antenna devices, and a transmitting beam of the antenna device connected to the transmitting circuit is provided. And the axis of the receiving beam of the antenna device to which the receiving circuit is connected are made substantially coincident with each other. Thus, only by displacing a single movable portion, it is possible to simultaneously deflect the separately provided transmitting beam and receiving beam in a state where their axes are aligned.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an antenna device according to a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1A is a sectional view of a main part, and FIG. 1B is a top view showing the structure of a fixed part and a movable part in a state where an upper conductor plate constituting a non-radiative dielectric waveguide described later is removed. FIG. In the figure, 32 is a fixed part, 31 is a fixed part 32
It is a movable part that is displaced in the left-right direction in the figure relative to. The movable section 31 is provided with three primary radiators 13a, 13b, and 13c. 18a, 18b, 18
c is a dielectric lens provided on the fixed part side, and the primary radiators 13a, 13b, 1 are disposed in respective focal planes.
3c is located. 60 is the movable part 31
Is a driving unit for displacing the primary radiators 13a, 13b, and 1 by the displacement of the movable unit 31.
The axial directions (azimuths) of the beams Ba, Bb, Bc determined by the positional relationship between 3c and the dielectric lenses 18a, 18b, 18c change.

The movable portion 31 constitutes a non-radiative dielectric line (hereinafter referred to as "NRD guide") by arranging dielectric strips indicated by 11a, 11b and 11c between the upper and lower conductor plates 14 and 15. ing. Dielectric strip 11a, 1
One end of each of 1b and 11c has an NRD circuit (hereinafter referred to as "hyper N") for transmitting a single mode of the LSM01 mode as described later.
RD Guide. " ) Is formed, and primary radiators 13a, 13b, and 13c, which are dielectric resonators, are coupled to the ends. In the fixed portion 32, dielectric strips 12a, 12b, and 12c are arranged between upper and lower conductor plates to form an NRD guide.

FIG. 2 is a diagram showing the relationship between the configuration of the directional coupler and the primary radiator and the dielectric lens.
(A) is a partial cross-sectional view of the movable part, and (B) is a top view in a state where an upper conductive plate constituting an NRD guide is removed.

In FIG. 2B, N on the movable portion 31 side
The end surfaces of the conductor plates of the RD guide and the NRD guide on the fixed portion 32 side are arranged in a non-contact state with a predetermined gap therebetween. Dielectric strips 11 and 12 of both NRD guides
Are arranged in parallel near the end faces of the conductor plates 14 and 16 so as to be close to each other. With this structure, the NRD on the fixed portion side
The directional coupler is configured by coupling the guide and the NRD guide on the movable portion side.

In the portions indicated by 11 'and 12' in FIG. 2, the distance between the conductor plates 14 and 15 is made narrower than the height of these dielectric strips so that the hyper mode for transmitting a single mode of the LSM01 mode is used. It constitutes an NRD guide. Since the hyper NRD guide has a feature that the bending radius of the curved path can be freely set, the connection between the directional coupler and the external circuit is facilitated. This also allows the overall size to be reduced.

The primary radiator 13 is formed of a cylindrical dielectric resonator, and uses, for example, a resonance mode of the HE111 mode. As shown in FIG. 2A, the upper conductive plate 15
Has an opening having a horn-shaped tapered portion coaxial with the primary radiator 13. And
A slit plate formed by slitting a conductor plate is sandwiched between the primary radiator 13 and the opening as shown in the figure. This has an electric field component in a direction perpendicular to the longitudinal direction of the dielectric strip 11 'and parallel to the conductor plates 14 and 15,
LSM having a magnetic field component in a direction perpendicular to the conductor plates 14 and 15
In the mode, an electromagnetic wave propagates in the dielectric strip 11 '. Then, the dielectric strip 11 'and the primary radiator 13
HE111 having an electric field component in the same direction as the electric field of the dielectric strip 11 'in the primary radiator 13
Mode occurs. As a result, a linearly polarized electromagnetic wave is radiated through the opening in a direction perpendicular to the conductor plate 14.
The dielectric lens 18 converges this to form a predetermined beam. Conversely, when an electromagnetic wave is incident from the opening through the dielectric lens, the primary radiator 13 is excited in the HE111 mode, and LS is applied to the dielectric strip 11 'coupled thereto.
Electromagnetic waves propagate in the M mode. In this example, the portions of the dielectric strips 11 ′ and 12 ′ are hyper NRD guides, but may be composed of a normal NRD guide (the height of the dielectric strip is equal to the distance between the upper and lower conductor plates). It is possible.

FIG. 3 is a sectional view taken along the line AA in FIG. 2B. The NRD guide on the movable portion 31 side includes upper and lower conductor plates 14 and 15 and the dielectric strip 11 therebetween, and the NRD guide on the fixed portion 32 side includes the upper and lower conductor plates 1 and 15.
6, 17 and the dielectric strip 12 therebetween. Then, the end faces of the conductor plates of both NRD guides are opposed to each other with a predetermined gap therebetween, and a predetermined groove extending in a direction parallel to the conductor plates 16 and 17 is formed in the end faces of the conductor plates 16 and 17. I have. This groove has a choke structure, and the electrode surface of the conductor plate (the opposing surface of the two conductor plates) acts as an equivalently continuous one. In addition,
This groove may be provided on the conductor plates 14 and 15 side.

FIG. 4 shows an example of a change in the beam due to the displacement of the movable portion 31. In the state of (A), the transmission beam B
c is directed in the forward 0 ° direction, and one receiving beam B
a is inclined to the left side, for example, in the direction of 15 °, and the other received beam Bb is inclined to the right direction by 15 °. From this state, when the movable part 31 is displaced rightward in the figure and becomes the state shown in FIG. 7B, the transmission beam Bc is tilted 15 ° to the left, and one of the reception beams Ba is 30 ° leftward. The other receiving beam Bb is tilted and faces the forward 0 ° direction. Conversely, when the movable portion 31 is displaced to the left in the figure to be in the state shown in FIG. 7C, the transmitted beam Bc is tilted 15 ° to the right, and one of the received beams Ba is shifted in the forward 0 ° direction. , And the other received beam Bb is inclined rightward by 30 °.

Thus, only by displacing a single movable portion, the directions of the three beams can be simultaneously deflected.

When a transmitting / receiving device is configured using the above-described antenna device, a transmitting circuit and a receiving circuit are connected to each port of the NRD guides 12a, 12b, and 12c as the fixed-part-side transmission lines shown in FIG. I just need.

Next, the configuration of a radar transmitting / receiving apparatus according to a second embodiment will be described with reference to FIGS. This second
The antenna device used in this embodiment is basically the same as that shown in the first embodiment. FIG. 5A shows two reception beams Ba and Bb and one transmission beam Bc, and a detection range when angle measurement is performed by a monopulse method using these beams.

FIG. 5B shows the relationship between the amount of beam deflection and the amount of displacement of the movable part. Here, “offset” is the displacement of the primary radiator with respect to the optical axis of the dielectric lens, and “tilt angle” is the angle indicating the direction of the beam with the front of the antenna device being 0 °. In this embodiment, Since different offsets are determined in advance for the three antennas, the three beams change by the same angle due to the displacement of the movable part while maintaining the relationship of the corresponding tilt angles.

FIG. 6 is a view showing a state of tilting of the three beams due to the displacement of the movable part. In the state shown in (A), the axis of the transmission beam Bc is approximately 15 ° from the front to the left.
It is tilted, and a range of, for example, ± 15 ° is measured in the left-right direction about the direction. In the state shown in (B), the axis of the transmission beam Bc is oriented in the forward 0 ° direction, and the angle is measured within a range of ± 15 ° in the left-right direction around the direction. In the state shown in (C), the transmission beam Bc
Is tilted approximately 15 ° to the right from the front, and a range of ± 15 ° is measured in the left-right direction with respect to that direction. By deflecting the transmission beam and the reception beam as a whole in this manner, angle measurement is performed over a wide range.

FIG. 7 is an equivalent circuit diagram of a radar transmitting / receiving device. Here, TX is a transmitting antenna composed of a primary radiator for forming a transmission beam Bc and a dielectric lens, and RX1 and RX.
2 are two beams forming the receiving beams Ba and Bb, respectively.
This is a receiving antenna including a secondary radiator and two dielectric lenses. The VCO is an oscillator whose oscillation frequency changes according to the control voltage, and transmits a transmission signal from the transmission antenna TX via an NRD guide. The mixer is a circuit for mixing a received signal and a local signal, and receives a received signal received by each primary radiator of each of the receiving antennas RX1 and RX2 from one port via an NRD guide, and inputs the received signal via a coupler. A part of the transmission signal extracted as a local signal is input from the other port. The mixer outputs the frequency component of the difference between the local signal and the received signal as intermediate frequency signals IF1, IF2.
The receiving circuit measures the angle in a monopulse system based on the sum signal and the difference signal of the intermediate frequency signals IF1 and IF2. The target azimuth angle is obtained from the relationship between the angle measurement information obtained by the monopulse method and the tilt angles of the three beams at that time.
That is, the transmission beam Bc is set at an angle obtained by the monopulse method.
Is obtained as target azimuth information for the front of the radar transmitting / receiving device.

Next, the configuration of a radar transmitting / receiving apparatus according to a third embodiment will be described with reference to FIGS.

FIG. 8A is a cross-sectional view of a main part, and FIG. 8B is a top view showing the structure of the fixed part and the movable part with the upper conductor plate removed. Here, two NRD guides by the dielectric strips 11a and 11b are provided on the movable portion side,
Primary radiators 13a and 13b to be respectively coupled are provided,
Two NRD guides provided by the dielectric strips 12a and 12b are provided on the fixed portion side, and the directional coupler is constituted by the NRD guide on the movable portion side and the NRD guide on the fixed portion side. Dielectric lenses 18a and 18b having a focal plane at the positions of the primary radiators 13a and 13b are provided on the fixed portion side.

In FIG. 8, the primary radiator 13a and the dielectric lens 18a constitute a receiving antenna, and the primary radiator 13a
b and the dielectric lens 18b constitute a transmitting antenna. Unlike the example shown in FIG. 1, the transmitted beam and the received beam have the same tilt angle. Therefore, when the driving section 60 displaces the movable section 31 in the left-right direction in the drawing, the transmission beam Bb and the reception beam Ba are always deflected at the same tilt angle.

FIG. 9 is a view showing a state of tilting of the two beams due to the displacement of the movable portion. In the state shown in (A), both the transmission beam Bb and the reception beam Ba face the forward 0 ° direction, and detect a range of ± 2 ° around the forward direction. In the state shown in (B), the transmitted beam Bb and the received beam Ba are tilted 10 ° to the left, and a range of ± 2 ° in the left and right directions with that direction as the center is detected.
Further, in the state shown in (C), the transmission beam Bb and the reception beam Ba are tilted 10 ° to the right, and a range of ± 2 ° in the left and right direction with that direction as the center is detected. By deflecting the transmission beam and the reception beam as a whole in this manner, angle measurement is performed over a wide range.

FIG. 10 is an equivalent circuit diagram of a radar transmitting / receiving device. Here, TX is a transmission antenna formed of a primary radiator forming a transmission beam Bb and a dielectric lens, and RX is a reception antenna formed of a primary radiator forming a reception beam Ba and a dielectric lens. The VCO is an oscillator whose oscillation frequency changes according to the control voltage, and transmits a transmission signal from the transmission antenna TX via an NRD guide. FM
In the case of the -CW method, the oscillation frequency is changed in a triangular waveform. The mixer is a circuit that mixes a received signal and a local signal. The mixer receives a received signal received by a primary radiator of a receiving antenna RX from one port through an NRD guide and transmits a received signal via a coupler. A part of the signal is input as a local signal from the other port. The mixer outputs the frequency component of the difference between the local signal and the received signal as an intermediate frequency signal IF. In case of FM-CW method,
The receiving circuit detects the relative speed and the distance to the target from the frequency of the intermediate frequency signal IF and its change.

If the transmitting beam and the receiving beam are separately provided in this manner, a circulator is not required, the isolation between transmission and reception can be easily increased, and only by displacing a single movable portion, The transmission beam and the reception beam always have the same tilt angle, and detection in a predetermined direction can be performed.

FIG. 11 is a diagram showing the configuration of the antenna device according to the third embodiment. In this example, 1
Six primary radiators, designated 3a to 13f, and associated NRD guide dielectric strips 11a to 11f are provided. On the other hand, the fixed portion 32 has the N
Dielectric strips 12a to 12f of the NRD guide which are combined with the RD guide to form a directional coupler are provided.
On the fixed part side, the dielectric lenses 18a to 18f are positioned so that the primary radiators 13a to 13f displace their focal planes.
18f is provided. With such a configuration, the six beams can be simultaneously tilted by displacing the drive unit 31 in the direction of the arrow in the figure. When a transmitting / receiving device is configured using this antenna device, a transmitting circuit or a receiving circuit may be connected to the respective ports # 1 to # 6 of the dielectric strips 12a to 12f of the NRD guide on the fixed portion side.

Next, a configuration example of the NRD guide and the primary radiator of the movable portion will be described with reference to FIG. 12, (A) is a partial perspective view, (B) is a perspective view showing a state in which the upper conductive plate 15 is removed from the state of (A),
(C) is a perspective view showing a state on the back side of the upper conductor plate 15. As described above, the grooves 20 and 21 are formed on the inner surfaces of the upper and lower conductor plates 14 and 15 of the movable portion side NRD guide, respectively, and the dielectric strip 11 and the primary radiator 13 are arranged at the center of the grooves. are doing. That is, grooves 20, 2
A space is formed in the opposing portion of the first and the dielectric strip 11 and the primary radiator 13 are arranged in the space.

The dielectric strip 11 and the upper and lower conductor plates 1
Reference numerals 4 and 15 form an NRD guide, and the left front surface in FIG. 4A is combined with the NRD guide on the fixed portion side to form a directional coupler. An opening is formed at the position of the conductor plate 15 corresponding to the upper part of the primary radiator 13, and this opening is
A slit plate 19 is interposed between the radiator 13 and the next radiator 13. The space defined by the grooves 20 and 21 includes the NRD guide and 1
Provide a range that does not adversely affect the function as the secondary radiator. For example, in the case of the 60 GHz band, the grooves 20 and 21 are provided so as to be separated from the dielectric strip by 2 mm or more in the width direction and 8 mm or more in the radial direction from the primary radiator.

The required number of sets of the NRD guide and the primary radiator are provided on the movable portion. In regions other than the grooves 20 and 21, the upper and lower conductor plates 14 and 15 are in contact with each other.
There is no coupling between RD guides, adjacent primary radiators, or adjacent NRD guides and primary radiators.
That is, isolation is ensured. Therefore, N
The set of the RD guide and the primary radiator can be arranged close to each other, and a large number of primary radiators and NRD guides can be provided in a small movable section.

[0039]

According to the first aspect of the present invention, a multi-beam antenna device in which a plurality of beams are simultaneously deflected by simply displacing a single movable portion relative to a fixed portion can be obtained. Since only the primary radiator and the movable part side transmission line coupled to the primary radiator need to be provided in the movable part, the movable part can be configured to be small and lightweight, and the movable part can be displaced at high speed even if a low torque motor or the like is used. . Moreover, since it is not necessary to rotationally drive the entire antenna device, it is possible to reduce the overall size and weight.

According to the second aspect of the present invention, a small and multi-beam transmitting / receiving apparatus can be obtained.

According to the third aspect of the present invention, the angle measurement is performed by the monopulse method, and the entire beam can be simultaneously deflected to perform the angle measurement over a wide range.

According to the fourth aspect of the present invention, it is possible to simultaneously deflect the separately provided transmitting beam and receiving beam while keeping the axes thereof coincident only by displacing the single movable portion. , While maintaining the isolation of transmission and reception,
The detection direction can be easily changed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an antenna device according to a first embodiment.

FIG. 2 is a diagram showing a configuration of a directional coupler and a movable unit in the device.

FIG. 3 is a sectional view of a directional coupler.

FIG. 4 is a diagram showing a state of tilt of each beam due to displacement of a movable part.

FIG. 5 is a diagram illustrating a relationship between each beam and a tilt angle of a beam with respect to an offset of a movable unit in the radar transmitting and receiving apparatus according to the second embodiment;

FIG. 6 is a diagram showing a change in a detection range when a beam is tilted.

FIG. 7 is an equivalent circuit diagram of a radar transmitting / receiving device.

FIG. 8 is a diagram showing a configuration of an antenna device according to a third embodiment.

FIG. 9 is a diagram showing a state of tilting of two beams due to displacement of a movable unit.

FIG. 10 is an equivalent circuit diagram of a radar transmitting / receiving device.

FIG. 11 is a diagram showing a configuration of an antenna device according to a fourth embodiment.

FIG. 12 is a diagram showing a configuration of an NRD guide and a primary radiator of a movable unit according to a fifth embodiment.

FIG. 13 is a diagram showing a relationship between three beams of a monopulse system and a detection range.

FIG. 14 is a diagram showing the principle of a monopulse system.

[Explanation of symbols]

 11, 12-dielectric strip 13-primary radiator 14, 15, 16, 17-conductor plate 18-dielectric lens 19-slit plate 20, 21-groove 31-movable part 32-fixed part 60-drive part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01Q 13/02 H01Q 13/02 19/06 19/06 19/28 19/28 F-term (Reference) 5J020 AA02 AA08 BB01 BC04 BC13 BD03 CA02 CA04 DA04 DA09 DA10 5J021 AA02 AA03 AA04 AA05 AA06 AB06 BA03 CA06 DA03 DA07 FA17 FA24 FA33 GA08 HA02 HA04 HA11 JA07 JA10 5J045 AA21 AA28 AB05 BA05 DA09 EA07 FA01 JA12 LA03 MA04 AC07

Claims (4)

[Claims] 1. A movable unit having a plurality of primary radiators and a movable unit side transmission line coupled to each of the primary radiators, and the fixed primary unit having the plurality of primary radiators each having a substantially focal plane. An antenna device comprising: a dielectric lens to be mounted; and a plurality of fixed-part-side transmission lines that are electromagnetically coupled to the movable-part-side transmission line, respectively, and a driving unit that displaces the movable part with respect to the fixed part. 2. A transmission / reception device comprising: the antenna device according to claim 1; and a transmission circuit and a reception circuit connected to the plurality of fixed unit side transmission lines. 3. At least three antenna devices according to claim 1, wherein a transmission circuit is connected to a fixed part transmission line of one of the antenna devices, and a transmission circuit is connected to a fixed part transmission line of the other two antenna devices. The receiving circuits are connected to each other, the axes of the receiving beams of the two antenna devices connected to the receiving circuits are different from each other, and the axes of the transmitting beams of the antenna devices connected to the transmitting circuit are set to the two receiving beams. Wherein the positional relationship between the primary radiator and the dielectric lens of each of the three antenna devices is determined so as to be located substantially at the center of the transmitting / receiving device. 4. At least two antenna devices according to claim 1, wherein a transmission circuit and a reception circuit are respectively connected to a fixed part transmission line of these antenna devices, and a transmission wave of the antenna device connected to the transmission circuit is provided. A transmission / reception device, wherein the axis of the beam substantially coincides with the axis of a reception beam of the antenna device to which the receiving circuit is connected.